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DAC80502: TUE calculation check

Yuxi Liu(Tony)
Expert 3340 points
Part Number: DAC80502
Other Parts Discussed in Thread: DAC82002

Tool/software:

Hi TIer

I see the TUE max value include Gain error right? this Gain error is DAC internal gain or Buffer gain?

How to understand this gain ? Thank you very much.

Do we have 1ch / 2ch DAC which TUE max value ＜ 0.05%FSR，large than 12bit, internal reference , output range include 0-5V? 

low cost version , do you think DAC80502 is good selection? I see FSR maximum value is large than 0.05%.

Why some DAC no TUE spec in datasheet?

How to understand TUE, in every output voltage , the TUE always small than TUE maximum?

  • 0
    TI__Mastermind 42273 points

    Hi Tony, 

    We try to characterize (measure) TUE in our newer high performance DACs. It takes time to characterize any spec to we choose what is most important when we release a new device. 

    Gain error is the error in the slope of the transfer function. It's an error that can come from a few sources that results in a gain on the DAC output. Ususally the largest contributor to gain error is the output buffer stage. 

    I'm seeing 0.1% maximum TUE in the DAC80502 datasheet. This means that at any code the output should be withing 0.1% of the idea value. The DAC8050x family is probably going to be the best choice here. 

    DAC82002 has a 0.06% FSR TUE but this does not have an integrated output buffer. This means the TUE will depend on what external buffer is chosen. 

    Best,

    Katlynne Jones